Friend of mine has two LPAs on separate towers and he loves them. He is
also a contester. One covers 20 through 10 and has a 40 meter 2 element
(shortened) beam about 10 feet above. Not sure about coverage of the other
LPA. They are both Tennedyne. They are HEAVY and have a large wind load
rating, requiring a substantial tower (45G or better) and rotator.
I have one C-4XL to cover 40-20-15-10. I can work 17 and 12 on this antenna
(20-15-10 feed) with gain about as good as a dipole. So, his only advantage
compared to me is on 17 and 12 (approx 6.x vs 2.x db gain). However, on
40-20-15-10 I consistently get reports at least as good from DX stations. I
should be getting slightly better reports but have a bunch of RG8X running
through several switches/components in the shack with causes at least 2 db
loss. This will be corrected soon.
Stacking LPAs is rare to my knowledge. The problem is in planning how far
to separate them. For best 20-15-10 performance the distance should be
about 33 feet. But this will not work well for 17 and 12, so you will get
better performance working each antenna separately (unphased) on these
bands.
Keith WD5DXL
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of RCARIELLO
Sent: Monday, June 21, 2004 9:45 AM
To: FCG; Towertalk
Subject: [TowerTalk] HF LOG-PERIODIC ANTENNAS Comments Please
Hello to all,
I am wondering if a stack of three Log-Periodic Antennas is the way to go.
At best my single tower station will have three Tri-Banders on it. Possibly
a Force12 C3S around 90-60-30 feet.
I have been seeing allot of talk about the Stepper Antenna Systems.
>From what I am reading, the big advantage in this type of antenna seems
>to
be the antenna tuning to the frequency of use.
In the past I have heard negative comments that a Log-Periodic has allot of
aluminum not being used. These remarks may be true when compared to
Mono-Band antennas but is it true when compared to tri-banders.
I am wondering if anyone has any experience with the performance of
Log-Periodic antennas as compared to a Tri-Banders. Is this the type of
antenna to use for contest operations.
TENNADTNE ANTENNAS
Any comments on the performance and quality of these antennas.
I am considering models:
T6---12 foot boom---6 elements
T8---18 foot boom---8 elements
I understand both these models can be side mounded on my tower.
Thanks for your help.
Rich AA2MF
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk